One of those two sites is distributing adware. Which of them?
File Converter (FOSS) by Adrien Allard was hosted on file-converter[.]org since a decade. Then someone a few weeks ago snatched that domain and it’s now distributing adware. Almost identical design for the page, 100% designed to deceive users to download a different product, as it’s called Zamzar.
Yes, Android apps are signed and Android refuses updates with a different signature.
What I mean is fake apps with slightly different names, does fdroid have the potential to approve them? Even if it’s open source, if someone intentionally adds malicious code it can take a couple months to spot, while the scan is going on.